Fix redundant_as_str .fixed file not being consistent

tests/ui/redundant_as_str.fixed

@@ -1,24 +1,24 @@
 #![warn(clippy::redundant_as_str)]
 
 fn main() {
-	let string = "Hello, world!".to_owned();
+    let string = "Hello, world!".to_owned();
 
-	// These methods are redundant and the `as_str` can be removed
+    // These methods are redundant and the `as_str` can be removed
     let _redundant = string.as_bytes();
     let _redundant = string.is_empty();
 
     // These methods don't use `as_str` when they are redundant
     let _no_as_str = string.as_bytes();
     let _no_as_str = string.is_empty();
 
-	// These methods are not redundant, and are equivelant to
-	// doing dereferencing the string and applying the method
+    // These methods are not redundant, and are equivelant to
+    // doing dereferencing the string and applying the method
     let _not_redundant = string.as_str().escape_unicode();
     let _not_redundant = string.as_str().trim();
     let _not_redundant = string.as_str().split_whitespace();
 
-	// These methods don't use `as_str` and are applied on a `str` directly
-	let borrowed_str = "Hello, world!";
+    // These methods don't use `as_str` and are applied on a `str` directly
+    let borrowed_str = "Hello, world!";
     let _is_str = borrowed_str.as_bytes();
     let _is_str = borrowed_str.is_empty();
 }